Choose the measurement method
CMMs, vision systems, optical comparators, scanners, form instruments, surface systems and dedicated gauges answer different questions. Start from tolerance, contact sensitivity, feature access, speed and required traceability.
The environment is part of the measurement
Temperature, vibration, cleanliness, humidity, air quality and part stabilization can dominate the result. Separate laboratory capability from shop-floor repeatability.
Used inspection equipment
Confirm software license transfer, controller support, probe and sensor inventory, calibration history, machine geometry, environmental requirements and whether a qualified service provider can reinstall and certify the system.
Connect quality to production
Use consistent part, feature and revision identifiers. Trend measurements against machines, tools, fixtures and time so the system supports process control instead of becoming an isolated report generator.
Questions manufacturers ask
Does higher resolution mean better accuracy?
No. Resolution is only one characteristic; accuracy, repeatability, uncertainty, environment and method all matter.
Can a CMM run on the shop floor?
Some systems are designed for it, but the actual thermal, vibration, contamination and protection requirements still need review.
What must transfer with used metrology equipment?
Hardware inventory, software rights, backups, calibration and service records, manuals, fixtures and an agreed acceptance test.
Primary sources and further reading
MBB uses these sources for general process and safety context. A link is not an endorsement, affiliation or substitute for current manufacturer documentation.